As far as I know (reading Asus Notebook Forums) this new Mobile GPU has nothing significant to offer over the 260 or 280M Mobile GPU's. It may run at somewhat lower Temps, but not sure.
My 260M Card seems to Max out under gaming at 93c, idles around 65c.

Guarenteed thier are a bunch of Notebook enthusiasts jumping all over the new G51jx A1 with the new GTS 360M.....

__________________

Introducing me n my OCD to Watercooling, is like taking an Alcoholic to an "all you can drink" Beach Bar in Mexico